#page {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  background-color: rgba(85, 85, 85, 0);
  color: #eee;
  min-height: 100%;
  transition: background-color ease 5s;

  a {
    color: #eee;
    text-decoration: none;

    &:hover {
      color: #fff;
      text-decoration: underline;
    }
  }
}

#card {
  position: relative;
  margin: auto;
  transition: width ease 0.5s, height ease 0.5s;

  header {
    position: relative;
    height: 105px;
    padding: 21px 0 0 100px;
    color: rgb(236, 236, 236);

    img {
      position: absolute;
      left: 0;
      top: 0;
      padding: 2px;
      box-shadow: 0 0 2px rgba(0, 0, 0, 0.3);
      border-radius: 5px;
    }
  }

  h1,
  h2 {
    margin: 0;
    font-weight: normal;
    transform: translateY(-20px);
  }

  h1 {
    color: #222325;
    text-shadow: #676666 1px 1px 2px;
    letter-spacing: 1px;
  }

  h2 {
    margin-top: 0.1em;
    font-size: 1.1em;
    text-shadow: #888 1px 1px 2px;
    letter-spacing: 2px;
  }

  ul {
    position: relative;
    padding: 0;
    transition: width ease 0.5s, height ease 0.5s;

    &:after {
      content: '';
      clear: both;
      display: block;
    }
  }

  li {
    position: absolute;
    list-style: none;
    width: 200px;
    height: 200px;
    overflow: hidden;
    line-height: 200px;
    background-color: #888;
    text-align: center;
    font-size: 4rem;
    transition: background-color ease 0.3s, top ease 0.5s, left ease 0.5s,
    width ease 0.5s, height ease 0.5s;

    &#half-first {
      height: 95px;
      line-height: 95px;
      font-size: 2rem;
    }

    &.quarter {
      width: 95px;
      height: 95px;
      line-height: 95px;
      font-size: 2rem;
    }

    a {
      display: inline-block;
      width: 100%;
      height: 100%;
      overflow: hidden;

      &:hover {
        text-decoration: none;
      }
    }

    span {
      position: absolute;
      top: 100%;
      left: 0;
      width: 100%;
      height: 100%;
      opacity: 0;
      font-size: 62.5%;
      transition: top ease 0.3s, opacity ease 0.3s;
    }

    i {
      display: inline-block;
      width: 100%;
      height: 100%;
      transition: opacity ease 0.3s, font-size ease 0.3s, color ease 0.3s;
    }

    &:hover i {
      opacity: 0;
      font-size: 10%;
    }

    &:hover span {
      display: block;
      top: 0;
      opacity: 1;
    }
  }
}

#quarter-third img {
  position: absolute;
  top: 100%;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  font-size: 62.5%;
  transition: top ease 0.3s, opacity ease 0.3s;
}

#quarter-first img {
  position: absolute;
  top: 100%;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  font-size: 62.5%;
  transition: top ease 0.3s, opacity ease 0.3s;
}

#whole-first {
  left: 0;
  top: 0;

  &:hover {
    background-color: #39c;
  }
}

#whole-second:hover {
  background-color: #d81;
}

#quarter-second:hover {
  background-color: #333;
}

#half-first:hover {
  background-color: #595;
}

#quarter-third:hover img{
  display: block;
  top: 0;
  opacity: 1;
}

#quarter-first:hover img {
  display: block;
  top: 0;
  opacity: 1;
}

#quarter-third:hover {
  background-color: #dd4b39;
}

#quarter-fourth:hover {
  background-color: #fff;
}

li#quarter-fourth:hover i {
  opacity: 1;
  font-size: inherit;
  color: #888;
}

//底部备案
#put-on-records {
  position: absolute;
  bottom: 100px;
  display: flex;
  align-content: center;
  justify-content: center;
  width: 100%;
}


li#quarter-first span {
  top: 0;
}

@media (min-width: 801px) {
  #card {
    width: 725px;

    ul {
      width: 725px;
      height: 200px;
      transition: width ease 0.5s;
    }

    header {
      position: absolute;
      top: -105px;
    }
  }
  #whole-second {
    left: 210px;
    top: 0;
  }
  #half-first {
    left: 420px;
    top: 0;
  }
  #quarter-first {
    left: 630px;
    top: 0;
  }
  #quarter-second {
    left: 420px;
    top: 105px;
  }
  #quarter-third {
    left: 525px;
    top: 105px;
  }
  #quarter-fourth {
    left: 630px;
    top: 105px;
  }
}

@media (min-width: 641px) and (max-width: 800px) {
  #card,
  #card ul {
    transition: width ease 0.5s;
  }
}

@media (min-width: 551px) and (max-width: 800px) {
  #card {
    width: 515px;

    ul {
      width: 515px;
      height: 305px;
    }
  }
  #whole-second {
    left: 210px;
    top: 0;
  }
  #card li#half-first {
    left: 0;
    top: 210px;
    width: 305px;
  }
  #quarter-first {
    left: 315px;
    top: 210px;
  }
  #quarter-second {
    left: 420px;
    top: 0;
  }
  #quarter-third {
    left: 420px;
    top: 105px;
  }
  #quarter-fourth {
    left: 420px;
    top: 210px;
  }
}

@media (min-width: 451px) and (max-width: 550px) {
  #card {
    width: 410px;

    ul {
      width: 410px;
      height: 410px;
    }
  }
  #whole-second {
    left: 210px;
    top: 0;
  }
  #card li#half-first {
    left: 0;
    top: 210px;
    width: 410px;
  }
  #quarter-first {
    left: 210px;
    top: 315px;
  }
  #quarter-second {
    left: 0;
    top: 315px;
  }
  #quarter-third {
    left: 105px;
    top: 315px;
  }
  #quarter-fourth {
    left: 315px;
    top: 315px;
  }
}

@media (max-width: 480px) {
  #card,
  #card ul {
    transition: none;
  }
}

@media (max-width: 450px) {
  #card {
    width: 100%;
    height: 100%;
    padding: 10px;

    ul {
      width: 0;
      height: 0;
      padding: 50%;
    }

    li {
      width: 49%;
      height: 49%;
    }

    li#half-first {
      width: 100%;
      height: 23.5%;
    }

    li.quarter {
      width: 23.5%;
      height: 23.5%;
    }

    li a {
      position: absolute;
      left: 0;
      top: 0;
    }
  }
  #whole-second {
    left: 51%;
    top: 0;
  }
  #card li#half-first {
    left: 0;
    top: 51%;
  }
  #quarter-first {
    left: 51%;
    top: 76.5%;
  }
  #quarter-second {
    left: 0;
    top: 76.5%;
  }
  #quarter-third {
    left: 25.5%;
    top: 76.5%;
  }
  #quarter-fourth {
    left: 76.5%;
    top: 76.5%;
  }
}


@media (max-width: 320px) {
  #card li {
    line-height: 147px;
  }
  #half-first {
    line-height: 70px;
  }
  #card li.quarter {
    line-height: 70px;
  }
}
